2 Chronicles 32:1-3

1After all that Hezekiah had so faithfully done, Sennacherib king of Assyria came and invaded Judah. He laid siege to the fortified cities, thinking to conquer them for himself.

2When Hezekiah saw that Sennacherib had come and that he intended to wage war against Jerusalem,

3he consulted with his officials and military staff about blocking off the water from the springs outside the city, and they helped him.